<template>
  <div style="display: flex;">
    <div :style="{width: (isCollapse ? '64px' : '208px')}">
      <el-menu
          background-color="#3c82f5"
          style="width: 100%;height: 100vh;"
          text-color="#fff"
          active-text-color="#ff0"
          :collapse="isCollapse"
          :collapse-transition="false"
          unique-opened
          router
      >
        <el-row style="padding-top: 10px;">
          <el-col :span="2"></el-col>
          <el-col :span="7" style="padding-left: 7px;">
            <el-avatar src="/imgs/admin/logo.png" style="width: 35px;height: 35px;"/>
          </el-col>
          <el-col :span="isCollapse ? 0 : 13">
            <span style="position: relative;color: #fff;top: 8px;left: 2px;font-weight: bold;">智慧车辆</span>
          </el-col>
        </el-row>
        <el-sub-menu index="1">
          <template #title><el-icon style="font-size: 21px;"><User/></el-icon><span>用户管理</span></template>
          <el-menu-item index="/user">用户列表</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="2">
          <template #title><el-icon style="font-size: 21px;"><Van/></el-icon><span>车辆管理</span></template>
          <el-menu-item index="/vehicle">车辆列表</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="3">
          <template #title><el-icon style="font-size: 21px;"><Location/></el-icon><span>围栏管理</span></template>
          <el-menu-item index="/geofence">电子围栏</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="4">
          <template #title><el-icon style="font-size: 21px;"><Place/></el-icon><span>调度管理</span></template>
          <el-menu-item index="/application">申请列表</el-menu-item>
          <el-menu-item index="/audit">调度审核</el-menu-item>
          <el-menu-item index="/distribute">车辆分配</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="5">
          <template #title><el-icon style="font-size: 21px;"><MessageBox/></el-icon><span>字典管理</span></template>
          <el-menu-item index="/dict">数据字典</el-menu-item>
        </el-sub-menu>
      </el-menu>
    </div>
    <div :style="{width: (isCollapse ? 'calc(100% - 64px)' : 'calc(100% - 208px)')}">
      <el-header style="padding-top: 22px;height: 10vh;background-color: #fff;">
        <el-row :gutter="10">
          <el-col :span="18">
            <el-icon style="font-size: 20px;" @click="changeCollapsed">
              <Expand/>
            </el-icon>
          </el-col>
          <el-col :span="6" style="position: relative;">
            <el-dropdown trigger="click" style="position: absolute;right: 20px">
              <span style="font-size: 19px;font-weight: bold;">
                {{ user.username }}
                <el-icon><arrow-down/></el-icon>
              </span>
              <template #dropdown>
                <el-dropdown-menu>
                  <el-dropdown-item @click="logout">退出登录</el-dropdown-item>
                </el-dropdown-menu>
              </template>
            </el-dropdown>
          </el-col>
        </el-row>
        <el-breadcrumb separator="/" style="position:relative;top:20px;">
          <el-breadcrumb-item>首页</el-breadcrumb-item>
          <el-breadcrumb-item v-for="item in breadcrumb">{{ item }}</el-breadcrumb-item>
        </el-breadcrumb>
      </el-header>
      <el-main style="height: 90vh;padding: 0;overflow-y:auto;">
        <router-view/>
      </el-main>
    </div>
  </div>
</template>

<script setup>
import {onMounted, ref} from "vue";
import {useRoute, useRouter} from "vue-router";

const isCollapse = ref(false);

const changeCollapsed = () => {
  isCollapse.value = !isCollapse.value;
}

const user = ref(getUser());

const logout = () => {
  if (confirm("确定要退出登录吗？")) {
    localStorage.removeItem("user");
    window.location.href = "/login";
    user.value = '';
  }
}

//定义数组用来维护当前面包屑导航显示的值
const breadcrumb = ref([]);
//定义对象用来维护路由path与面包屑数组值的对应关系
let map = {
  '/user': ['用户管理', '用户列表'],
  '/vehicle': ['车辆管理', '车辆列表'],
  '/geofence': ['围栏管理', '电子围栏'],
  '/geofenceMap': ['围栏管理', '新增围栏'],
  '/application': ['调度管理', '申请列表'],
  '/audit': ['调度管理', '调度审核'],
  '/distribute': ['调度管理', '车辆分配'],
  '/dict': ['数据字典', '字典管理'],
  '/dictOption': ['数据字典', '字典项管理']
};
//useRoute()是vue路由器提供的一个API,用来访问当前组件的路由状态数据,获取的是当前路由对象
const route = useRoute();
//定义方法,每次路由发生变化时,立即触发
const updateBreadcrumb = (route) => {
  //取出当前路由的path值
  const path = route.path;
  //从map对象中取出此path对应的面包屑数组值
  breadcrumb.value = map[path];
}
//一进到页面立即执行的方法onMounted()
onMounted(() => {
  updateBreadcrumb(route);
})
//获取一个路由器对象
const router = useRouter();
//监听路由的变化,如果发生了改变
router.beforeEach((to, from, next) => {
  //立即更新面包屑的值
  updateBreadcrumb(to);
  //再进行路由跳转
  next();
})
</script>